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首页> 外文期刊>Journal of Non-Crystalline Solids: A Journal Devoted to Oxide, Halide, Chalcogenide and Metallic Glasses, Amorphous Semiconductors, Non-Crystalline Films, Glass-Ceramics and Glassy Composites >Study of IR absorption properties of fumed silica-opacifier composites
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Study of IR absorption properties of fumed silica-opacifier composites

机译：气相法二氧化硅-遮光剂复合材料的红外吸收性能研究

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摘要

Mineral powders were added into fumed silica as IR opacifers in order to develop opacified thermal insulating composites for application at high temperatures up to 1000 degrees C. The opacifying effect was evaluated with effective specific extinction. The results indicated that opacifiers could effectively block IR radiation heat transfer and improve thermal insulating properties of fumed silica. Among four opacifiers investigated in this paper, SiC was proved to be the best one for excellent extincting performance. When SiC was adopted with average particle size of 3.029 mu m and mass ratio of 25%, the values of effective specific extinction increased from less than 12.6 m(2)/kg to about 55 m(2)/kg in the wavelength range from 2.5 to 7 mu m. It was demonstrated that fumed silica-opacifier composites are efficient high temperature insulating materials.
机译：将矿物粉末作为IR遮光剂添加到气相二氧化硅中，以开发可在高达1000摄氏度的高温下使用的不透明隔热复合材料。通过有效的比消光评估了不透明效果。结果表明，遮光剂可以有效地阻止红外辐射的传热，提高气相二氧化硅的隔热性能。在本文研究的四种遮光剂中，SiC被证明是具有出色消光性能的最佳遮光剂。当采用平均粒径为3.029μm，质量比为25％的SiC时，有效比消光值在以下波长范围内从小于12.6 m（2）/ kg增加到约55 m（2）/ kg。 2.5至7微米结果表明，气相二氧化硅-遮光剂复合材料是有效的高温绝缘材料。

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